需要引入头文件#include<algorithm>

1.for_each

#include<iostream>using namespace std;#include <vector>#include <algorithm>class MyPrint {public: void operator()(int val) const{ cout << val << " "; } };void printVector(int val) { cout << val << " ";}void test() { vector<int> v1; for (int i = 0; i < 10; i++) { v1.push_back(i); } //利用普通函数 for_each(v1.begin(), v1.end(), printVector); cout << endl; //利用仿函数 for_each(v1.begin(), v1.end(), MyPrint()); cout << endl;}int main() { test(); system("pause"); return 0;}

2.transform：将容器搬运到另一个容器中

#include<iostream>using namespace std;#include <vector>#include <algorithm>class Transform {public: int operator()(int val) const{ //这里可以对val进行一些判断 return val; } };class MyPrint {public: void operator()(int val) const { cout << val << " "; }};void test() { vector<int> v1; for (int i = 0; i < 10; i++) { v1.push_back(i); } vector<int> v2; //目标容器需要先开辟空间 v2.resize(v1.size()); transform(v1.begin(), v1.end(), v2.begin(), Transform()); for_each(v2.begin(), v2.end(), MyPrint()); cout << endl;}int main() { test(); system("pause"); return 0;}

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